Out of 10 women I can think of on tirz right now, only 1 has needed to bump up to 5 after the first month. Most have been able to stay or move up after a few mos. They lost at least 1lb/wk on the starting dose, but usually more. Hell, my husband lost 20 on it and we cut his dose in half, because he said he’d feel like a bitch any lighter. I’m in some groups where women lose on an even lower dose. Classified as super responders, but worth it to try. Hell, I started 1.25 recently to see if it helps autoimmune numbers, and I dropped 3lbs in a week. Def don’t want to lose and didn’t even realize I’d cut dietary intake.
Idk my approach has always been lowest effective dose of anything. Would also give her time to work up as/if doses become ineffective.